JP2005322987A - Composite speaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a composite speaker which provides a desired sound field without distorting sound waves radiated from a tweeter. <P>SOLUTION: The composite speaker 10 having a tweeter 15 at the sound radiation side of a main speaker unit 11 comprises a reflection plate 31 disposed at the radiation side of the tweeter 15 for reflecting sounds radiated from the tweeter 15 in a specified direction, and the reflection plate 31 is turnably mounted relative to the tweeter 15. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present application belongs to the technical field of a composite speaker device that is used in various audio devices and in which a tweeter unit is disposed on the sound output side of the main speaker unit.

  Conventionally, this type of composite speaker device is disclosed in Patent Document 1, for example. The composite speaker device 1 includes a main speaker unit 2 as shown in FIG. 1, and the main speaker unit 2 includes a speaker frame 3 and a vibrating unit 4 held in a suspended state on the speaker frame 3. And a magnetic circuit unit 5.

A tweeter unit 7 is fixed to the center pole 6 of the yoke in the magnetic circuit unit 5, and a reflector that reflects the sound emitted from the tweeter unit 7 in a desired direction in front of the tweeter unit 7. 8 is inclined and fixed.
JP 2002-209293 A

  By the way, in the conventional composite speaker device 1 shown in FIG. 1, the reflector 8 is inclined and fixed in front of the tweeter unit 7. The sound wave emitted from the tweeter unit 7 may be distorted from the front, and it may be difficult to obtain a desirable sound field in the passenger compartment. Therefore, since the conventional composite speaker device 1 has the reflector 8 attached in a fixed state, the degree of freedom of the attachment position and the attachment angle is low, and it is difficult to obtain a desirable sound field particularly when it is used in a vehicle. Met.

  The present application has been made in consideration of the above circumstances, and an example of the problem is to provide a composite speaker device capable of obtaining a desired sound field without distortion of sound waves emitted from the tweeter unit. There is.

  In order to solve the above-described problem, a composite speaker device according to claim 1 is a composite speaker device in which a tweeter unit is disposed on the sound emission side of the main speaker unit, and is disposed on the sound emission side of the tweeter unit, and A reflection plate for reflecting a sound emitted from the tweeter portion in a predetermined direction is provided, and the reflection plate is rotatably attached to the tweeter portion.

  An embodiment of a composite speaker device according to the present application will be described with reference to the drawings. The embodiment described below shows an example in which the composite speaker device according to the present application is applied to a vehicle-mounted speaker mounted on a vehicle such as an automobile.

  Specifically, the composite speaker device according to the present embodiment is a so-called two-way cone speaker configured to be attachable to a side door of a vehicle.

  First, the configuration of the composite speaker device according to the present embodiment will be described with reference to FIGS. 2 is a cross-sectional view of the composite speaker device according to the present embodiment, and FIG. 3 is a front view of FIG.

  As shown in FIG. 2, the composite speaker device 10 includes a main speaker unit 11, and the main speaker unit 11 includes a speaker frame 12 and a vibrating unit 13 that is held in a suspended state on the speaker frame 12. And a magnetic circuit unit 14. A tweeter unit 15 is disposed on the sound emission (front side) side of the main speaker unit 11.

  The speaker frame 12 is a member that holds the vibration part 13 and the magnetic circuit part 14 and is formed in a substantially disk shape, and a hole 12a for adjusting the back pressure generated by the vibration of the diaphragm 16 is provided at a necessary place. Many are provided.

  In the front opening of the speaker frame 12, the fixing surface 18 of the edge 17 bonded to the front opening (upper side of FIG. 2) of the diaphragm 16 and the outer periphery of the damper 20 bonded to the outer periphery of the voice coil bobbin 19 are fixed. A surface 21 and the like are formed.

  As shown in FIG. 3, a plurality of (for example, four) notches 22 are circumferentially provided at the front opening edge of the speaker frame 12 so as to extend outwardly and be attached to a counterpart member, for example, a side door of a vehicle. Are formed at equal intervals.

  Further, the magnetic circuit unit 14 described above is fixed to the rear end surface 23 of the speaker frame 12. As the material of the speaker frame 12, for example, a plated steel plate, a resin member, an aluminum die cast member, or the like is used. In the case of a plated steel plate, press processing is performed. In the case of a resin member, resin molding processing is performed. It is formed by die casting or the like.

  The vibrating unit 13 includes a diaphragm 16, a voice coil 24, an edge 17, a damper 20, and the like.

  The diaphragm 16 radiates the vibration converted from the electrical input signal input to the voice coil 24 to the mechanical vibration as a sound corresponding to the input signal, and has a substantially truncated cone shape. On the diaphragm, either a natural fiber or a chemical fiber diaphragm formed by hot pressing is laminated via a film.

  The center of the diaphragm 16 is bonded and fixed to the upper end of the cylinder of the voice coil bobbin 19. The inner periphery of the edge 17 is bonded and fixed to the front opening of the diaphragm 16, and the outer periphery of the edge 17 is fixed. Is fixed to the fixing surface 18 of the front opening of the speaker frame 12.

  The outer periphery of the voice coil bobbin 19 to which the diaphragm 16 is fixed is bonded and fixed to the inner peripheral portion of the damper 20, and the outer peripheral portion of the damper 20 is bonded and fixed to the fixing surface 21 of the speaker frame 12. Therefore, the diaphragm 16 is held on the speaker frame 12 in a suspended state by the edge 17 and the damper 20.

  The edge 17 is formed in an annular shape, and is a support member that supports the diaphragm 16 by adhering to the front opening edge of the diaphragm 16 and has a function of restoring to a predetermined position when the diaphragm 16 vibrates. For example, a thin cloth, urethane, rubber or the like is used as the material of the edge 17 and is formed by molding these.

  The damper 20 is a support member that supports the diaphragm 16 so that the diaphragm 16 that is bonded and fixed to the voice coil bobbin 19 moves following the vibration of the voice coil bobbin 19. Has been. For the material of the damper 20, for example, resin or blended spinning is used.

  The magnetic circuit unit 14 includes a yoke 25, a magnet 26, a center piece 27, and the like. The yoke 25 is attached to the upper surface of the magnet 11, and the center piece 27 is attached to the lower surface of the magnet 26.

  Next, the configuration of the tweeter unit 15 will be described.

  The tweeter unit 15 is mounted on the protrusion 27 a of the center piece 27 via a connecting portion 28 and a rotation mechanism 40 described later. As shown in FIGS. 3 and 4, the tweeter unit 15 includes a reflector 31, and the reflector 31 is a plate that reflects and guides sound output from the tweeter unit 15 in a predetermined direction. A curved portion 32 that is curved with respect to the horizontal direction is integrally formed with the reflector 31 up and down, and a material such as a resin is used as the material of the reflector 31.

  The tweeter unit 15 is a loudspeaker speaker and includes a diaphragm 33, a magnetic circuit unit 34, and the like as shown in FIG.

  The magnetic circuit unit 34 includes a yoke 35, a magnet 36, a center piece 37, and the like.

  Next, the rotation mechanism 40 of the reflecting plate 31 will be described.

  As shown in FIG. 2, the rotating mechanism 40 holds the reflecting plate 31 so as to be rotatable in both forward and reverse directions, and an outer cylinder 41 shown in FIGS. 5 (A) and 5 (B) and the outer cylinder 41 are fitted and attached. It comprises an inner cylinder 50 shown in FIGS. 6A and 6B that holds the cylinder 41 rotatably.

  As shown in FIGS. 5A and 5B, the outer cylinder 41 includes a flange portion 42 fixed to the bottom surface of the reflecting plate 31, a body portion 43 formed integrally with the flange portion 42, and the body portion. Leg portions 44 formed with a plurality of elastic pressing pieces 44 a formed integrally with the portion 43 in the circumferential direction, projecting portions 45 projecting in the center direction from the inner circumferential surface of the body portion 43, and the upper surface of the flange portion 42 And two electrode portions 46 attached to the.

  As shown in FIGS. 6 (A) and 6 (B), the inner cylinder 50 is formed on the upper part, and a gear part 51 pressed against the pressing piece 44a of the outer cylinder 41, and an outer cylinder formed on the inner peripheral surface of the gear part 51. The stopper 52 which latches the protrusion part 45 of 41, and the fixing | fixed part 53 fixed to the hole formed in the projection part 27a of the connection part 28 and the centerpiece 27 are comprised.

  Therefore, when the reflecting plate 31 is rotated, the outer cylinder 41 of the rotating mechanism 40 is rotated with respect to the inner cylinder 50, and when the outer cylinder 41 rotates more than a predetermined angle, the protruding portion 45 is engaged with the stopper 52 of the inner cylinder 50. It is stopped and further rotation is prevented. Accordingly, the lead wire 55 (shown in FIG. 2) connected to the electrode portion 46 is not forcibly twisted, and the disconnection of the lead wire 55 can be prevented in advance.

  Further, since the pressing piece 44a of the outer cylinder 41 rotates while being pressed against the gear portion 51 of the inner cylinder 50, when the reflecting plate 31 is rotated to reach a desired rotation angle, as shown in FIG. Since 44a is fitted and positioned between the gear parts 51, it is possible to prevent the reflecting plate 31 from rotating unexpectedly.

  Here, for example, the composite speaker device 10 according to the present embodiment is the composite speaker device according to the present application, the tweeter unit 15 is the tweeter unit according to the present application, the reflection plate 31 is the reflection plate according to the present application, and the curved portion 32 is the present application. The protruding portion 45 and the stopper 52 constitute the rotation preventing mechanism according to the present application, and the gear portion 51 of the inner cylinder 50 and the leg portion 44 of the outer cylinder 41 constitute the positioning mechanism according to the present application.

  As described above, in this embodiment, the reflection plate 31 is configured to be rotatable by the rotation mechanism 40, and by adjusting the angle of the bending portion 32 as shown in FIG. 8, a high sound pressure level can be obtained.

  The effects of the present application will be described below using data obtained when the composite speaker device 10 according to the above embodiment is prototyped and measured.

  FIG. 9 shows the measurement results when measuring the frequency characteristics in the frequency range of 10 Hz to 50000 Hz with the conventional composite speaker device, and FIGS. 10 to 12 show the frequency characteristics measured with the composite speaker device 10 according to the above embodiment. The measurement results are shown.

  That is, FIG. 9 shows sound pressure levels when the reflector is tilted at 0 °, 30 °, and 60 ° in the conventional composite speaker device.

  10 shows the sound pressure level when the reflector 31 is in the direction (0 °) shown in FIG. 3 in the composite speaker device 10 according to the embodiment. FIG. 11 shows the sound pressure level in the composite speaker device 10 according to the embodiment. FIG. 12 shows a sound pressure level obtained by rotating the reflecting plate 31 by 30 ° with respect to the normal lines in the A direction and the B direction in FIG. 3, and FIG. 12 shows the reflecting plate 31 in the composite speaker device 10 according to the above embodiment. The sound pressure level rotated by 60 ° with respect to the perpendicular lines in the A direction and the B direction is shown.

(Measurement result)
As can be seen from FIG. 9, when the reflector 31 is installed in a fixed state, the sound pressure level suddenly drops at 30 ° and 60 ° at a frequency of 15000 Hz or higher, resulting in poor high frequency characteristics, and the sound pressure level. In order to change the angle, the mounting angle of the reflector 31 must be changed.

  On the other hand, the composite speaker device 10 according to the present embodiment is excellent in high frequency characteristics because the sound pressure level does not drop suddenly at 30 ° and 60 ° at a frequency of 15000 Hz or more as shown in FIGS. Further, since the reflecting plate 31 can be rotated forward and backward by the rotating mechanism 40, the sound pressure level can be easily controlled as shown in FIGS. 10 to 12 by changing the angle of the reflecting plate 31, An ideal sound field can be obtained.

  The above embodiment has the following effects.

  By attaching the reflecting plate 31 to the tweeter unit 15 so as to be rotatable by the rotating mechanism 40, the sound wave emitted from the tweeter unit 15 is not distorted by changing the angle of the reflecting plate 31, so that a desirable sound field is obtained. Can be obtained.

  In addition, since the curved portion 32 that reflects the sound emitted from the tweeter unit 15 at a predetermined angle is formed on the reflection plate 31, the distortion of the sound wave emitted from the tweeter unit 15 can be prevented. Since a plurality of reflection plates 31 are formed, distortion of sound waves emitted from the tweeter unit 15 can be reliably prevented.

  Further, in order to prevent the reflector 31 from rotating more than a predetermined angle, the lead wire 55 connected to the electrode portion 46 is forcibly twisted by providing a rotation prevention mechanism composed of the protrusion 45 and the stopper 52. Therefore, disconnection of the lead wire 55 can be prevented in advance.

  In order to position the reflecting plate 31 with respect to the tweeter unit 15, the pressing piece 44 a is fitted and positioned between the gear portions 51, so that the reflecting plate 31 can be prevented from rotating unexpectedly. .

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, in the above-described embodiment, an example in which two reflecting plates 31 are formed has been described. However, the present invention is not limited thereto, and at least one reflecting plate 31 may be formed.

It is sectional drawing which shows the conventional composite type speaker apparatus. It is sectional drawing of the composite type speaker apparatus in this embodiment. FIG. 3 is a front view of FIG. 2. It is an expanded sectional view which shows the tweeter unit of FIG. (A), (B) is sectional drawing and a top view which show the outer cylinder of a rotation mechanism. (A), (B) is sectional drawing and a top view which show the inner cylinder of a rotation mechanism. It is explanatory drawing which shows the positioning mechanism in this embodiment. It is explanatory drawing which shows the reflective state of the sound wave of the reflecting plate in this embodiment. It is a figure which shows the directional characteristic data of the conventional composite type speaker apparatus. It is a figure which shows the directional characteristic data which made the angle of the reflecting plate 0 degree in this embodiment. It is a figure which shows the directional characteristic data which made the angle of the reflecting plate 30 degrees in this embodiment. It is a figure which shows the directional characteristic data which made the angle of the reflecting plate 60 degrees in this embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10: Composite type speaker apparatus 11: Main speaker unit 12: Speaker frame 13: Vibration part 14: Magnetic circuit part 15: Tweeter unit 16: Diaphragm 17: Edge 20: Damper 25: Yoke 26: Magnet 27: Centerpiece 31: Reflector 32: Curved part 40: Rotating mechanism 41: Outer cylinder 42: Inner cylinder 44a: Pressing piece 45: Protruding part 52: Stopper

Claims (5)

In the composite speaker device in which the tweeter part is arranged on the sound emission side of the main speaker unit,
A reflector disposed on the sound emission side of the tweeter unit and reflecting the sound emitted from the tweeter unit in a predetermined direction;
A composite speaker device, wherein the reflector is rotatably attached to the tweeter unit. The composite speaker device according to claim 1,
A composite speaker device, wherein a curved portion for reflecting a sound emitted from the tweeter portion at a predetermined angle is formed on the reflection plate. The composite speaker device according to claim 1 or 2,
A composite speaker device comprising a plurality of the reflecting plates. The composite speaker device according to any one of claims 1 to 3,
A composite speaker device comprising a rotation prevention mechanism for preventing the reflection plate from rotating beyond a predetermined angle. The composite speaker device according to any one of claims 1 to 4,
A composite speaker device comprising a positioning mechanism for positioning the reflecting plate with respect to the tweeter unit.

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